HEALTH CALCULATOR BMI Calculator Calculate Body Mass Index using metric or imperial units. Calculate for Adult (20+) Child / Teen (2–19) Age (years) Sex used by the growth chart Select Boy / male chart Girl / female chart Units Metric Imperial Weight kg Height cm Weight lb Height ft in Calculate BMI Your BMI — kg/m² Open CDC Child and Teen BMI Calculator ↗ BMI is a screening measure, not a diagnosis. Discuss health concerns or results with a qualified health professional.